Plaster board



ct. 14, 1930. y H. A. cuMi-'ER I 1,778,145

PLAS TER BOARD Filed March 15j 1926 1 27a/Ungarn (2. faffffz,

. M/M/of Patented er. 1,4, r1930v P W UN-lfnan STATES Hanny A.

PMENTv OFFICE ...f-l: OF CHICAGO, ILLINOIS, ASSIGNOR F ONE-HALF TOWILLABD J'.

MASON, 0F GREENWICH, CONNECTICUT PIASTRE. BOARD Application-lied March15, 1926. Serial No. 94.685.

This invention relates to plasterboard, and refers more particularly toa plasterboard built up of felted fibrous material. rlhe preferredembodiment of the invention comf prises va corrugated surface sheetunited to a fiat imperforate base sheet.

The plasterboardof the present invention may be used as aplaster-receiving board or as plaster lath, or as a sound deadenerbetween floors,walls, or the like, and for moistureproofing solidfrost-transmitting walls such as brick, stone, or the like, upon theinner side of .which plaster'is to be applied.

The board of the present invention possesses, among other properties,the advantage of functioning as insulation against transmission'of bothheat and cold in addition to its sound-proong and weather-proofingproperties.

The plasterboard may be made in continuous elongated exible sheets androlled into convenient shipping rolls as asphaltic rooting material ismanufactured and rolled for shipment.

The plasterboard of the present invention may be nailed directly tostuds, solid Walls, rafters, and the like, and may be used as a liningfor refrigerators, cold storage rooms, or the like, to exclude heat andmoisture from such enclosures.

In the drawings 4 Fig. l is a face view of a plasterboard manufacturedin accordance with the present invention, and 4 f Fig. 2 is a ,crosssectional view taken on the staggered line 2-'4-'2 of Fig. 1.

Referring more in detail to the drawings, l designates as a whole acorrugated surface sheet, and 2 a flat, imperforate basesheet ,which maybe united thereto by means of the adhesive 3. This adhesive 3 maysimultane- 4ously -function as a waterproofing or mois-` ture-proofingmedium, or a moisture-proofing medium may be incorporated directly intothe felt. The base sheet 2 may be a sheet tively cheap material, such aschip board or through. The structure may be made in a similarsubstances, and may be provided with the alternate ribs 4, valleys 5,and ribs 6. The ribs 4 are preferably self-supporting and rectangularlyshaped in cross-section, thus obviating the necessity for anyreinforcing elements. The area between the exterior side walls of eachof the ribs 4 is substantially the same as the Width of these ribs it.Each of the rectangularly shaped ribs 4 may be provided with holes 7through which the plaster 6a 8 will key, as shown clearly at the righthand side of Fig. 2.

When this built up structure is installed,

the nails will pass through both the corru gated sheet l and base sheet2 and serve as 65 auxiliary meansto firmly hold the corrugated and flatsheets in contact, in addition to the cementitious material 3.

As a feature of the present invention, to provide a corrugated sheetsuitable for plaster as described herein which will be Sullicientlyreinforced and of the required stiffness and rigidity, I have conceivedthe idea of providing ribs 6, preferably rounded in form and of muchless width than the ribs 4, in the valley spaces 5 between the exteriorside walls of the rectangularly shaped ribs 4. These auxiliary ribs 6are preferably not provided with holes for keying plaster but serve asreinforcing ribs or areas for the sheet.

The board of the present invention serves as an insulator to prevent thetransmissionof heat and, possessing moisture-proofing properties, itprevents frost from passing therecontinuous sheet in much the samemanner as roofing material is made, being rolled into convenient formfor shipment. The sheet may be severed subsequently into suitablelengths and properly secured to a wall to be plastered.

In addition to acting as a reinforcement, the ribs 6, having a closedsurface (that is, not apertured), will provide dead air spaces 9 betweenthese ribs and the flat base sheet. These dead air spaces 9 willeffectively function to prevent the transmission of heat and coldthrough the wall and will also effectively deaden the transmission ofsound. By

forming the ribs 4 in substantially rectangu- 100 30 surface only larsha e and making them self-supporting, I am-ab e to .dispense withanyother supportin or reinforcing elements.

claim as my invention:

5 1. A plasterboard, comsrising a sheet of fibrous-material corru ate toform self-supporting interspaced ri s and alternate channels betweensaid ribs, alternate ribs being rectangularly shaped in cross-section,the im spaces between the exterior walls of the rectangularly shapedribs being provided with' smaller auxiliaryreinforcingribs, the faces ofthe rectangularly shaped ribs on the upper s surface only beingperforated at intervals w to permit keying of plaster, and a flat basesheet cemented to th lower flat imperferatable faces of the corrugatedsheet, said smaller auxiliary reinforcing ribs being of relatively lesswidth than the width of the' en- -20 larged rectangularly shaped ribs.2. A plasterboard, com rising a sheetof fibrous material corru ated toform se1f-sup porting interspaced ri s and alternate channels betweensaid ribs, 'alternate ribs being 5 rectanlarly shaped in cross-section,the spaces tween the exterior walls of the rec-' tangularly shaped ribsbeing provided with smaller auxiliary reinforcing ribs, the faces of therectanllarly shaped ribs on the u per ing perforated at interva 's topermit keying of plaster, and a flat base sheet cemented to the lowerflat imperforatable faces of the corrugated sheet, said smaller auxiliareinforcing ribs being of relatively, 3., less wi th than the width ofthe enlarged rectangularly shaped ribs and presenting a closed surfaceto orm air spaces between the auxiliary ribs and said base sheet.

3. A plasterboard, com rising a sheet of 4@ brous material corru te toform self-supporting interspaced ri s and alternate channels betweensaid ribs, alternate ribs being rectan ularly shaped 'in cross-section,the

spaces tween the exterior walls of the rec- 45. tangularly shaped ribsbeing provided with smaller auxiliar imperforate reinforcing ribs, thefaces o the rectan larly shaped ribs on the upper surface only beinrforated at intervals to permit keying o plster,

54p and a flat base sheet cemented to the llower at imperforatable facesof the corrugated sheet, said smaller auxiliary reinforcing ribs bein ofrelatively less width than the width of t e enlarged rectangularlyshaped ribs,

55 the area between the exterior side walls of each of the rectangularribs being substantially the same as the width of said ribs.

il @RY A. QUIMPER.

